Sealing means



W. M. BROOKS. SEALING MEANS. APPLICATION FILED SEPT. 24, 1921.

Patented May 23, 1922.

a pl;

FA S- INVENTOR W W BY WW v ATTORNEY WIN'FRED MUDGE BROOKS, OF SOUTHORANGE, NEW JERSEY.

SEALING MEANS.

aiaees.

Specification of Letters Patent.

Patented May 23, 1%22.

Application filed September 24, 1921. Serial No. 502,963.

To all whom it may cmtcemz:

Be it known that l, Winrnnn M. BROOKS, a citizen 0'1 the United States,and a resident of South Orange, in the county of Essex and State of NewJersey, have invented certain new and useful Improvements in Sealing liieans, of which the following is a spe iiication.

This invention relates to sealing devices of the character in which atell-tale member is bent back upon itself Or upon another member, thebendin taking place in the plane ot a weakened zone so that when saidtell-tale member is unbent the metal is fractured and the memberdetached thereby thus revealing that the seal has been tampered with.

T he weakened zone has heretofore been produced by scoring or groovingthe material, the groove being of equal depth throughout its length, andwith this construction diiiiculty has been experienced in obtainingrequisite degree of weakness without, at the some time, rendering thematerial so weak as to fracture the material during the looking andsealing operation.

I have found that by varying the depth oi the groove longitudinally withits deepest part at its center portion and shallowest parts at its ends,the integrity of the material oi the tell-tale member is assured whenthe member is bent during the sealing or looking operation and, at thesame time, fracture oi? the material when unbending the same isinvariably effected.

in the accom )anying drawings the invention is disclosed in a concreteand several preferred forms in which Fig. l is a plan view of a sealingmember embodying the invention;

Fig. is plain view of a modified form of sealing member embodying theinvention;

Fig. 3 is a detail plan view of the weakened zone;

Fig. 4 is a longitudinal sectional view through one of the grooves;

Fig. 5 is a transverse sectional View through the weakened zone.

The character of the sealing medium is immaterial and I have shown, inFig. 1 as an illustration of the use to which the invention may be put,the type of sealing medium disclosed in Patents Nos. 1.355% and 1380038and, in Fig. 2, the haracter of the sealing medium disclosed inapplication Ser. No. l90213 and it is therefore unnecessary to describethe construction and operation of these devices in detail except tostate that. 1 is a tell-tale member which may be integral with a mainmember 2 or separate therefrom and is provided with a weakened zoneproduced by one or more grooves 3.

The groove, as here shown, has a curved bottom the curve beinglongitudinal of the groove and deepest at its center part dandshallowest at its ends 5. it will also be noted that said groove is alsowider at its central portion than at its end portions.

I claim 1. In a sealing device, a tell-tale member having a weakenedzone, the weakening consisting of a groove of varying depthlongitudinally with its deepest part at the center portion and shallowparts at its ends.

2. in a sealing device, a tell-tale member having a weakened zone, theweakening consisting of a groove, the bottom of which is curvedlongitudinally with its deepest part at its center portion and shallowparts at its ends.

Signed at New York city, in the borough of Manhattan, county and Stateoi New York. this 22nd day of September, 1921.

WINFRED MUDGE BROOKS.

